audiodd

Simple Recording with Audacity:
http://manual.audacityteam.org/o/man/tutorial_your_first_recording.html

Mixing a Narration With Background Music
http://manual.audacityteam.org/o/man/tutorial_mixing_a_narration_with_background_music.html
(see all the tutorials!)
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How to Add an Audio File to Wikispaces:

https://www.youtube.com/v/2xPUc_oXvtY
[opens HD 720p video in full window]